Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism01:10

Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism

Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide anion...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Mechanistic insights into radical formation and functionalization in copper/<i>N</i>-fluorobenzenesulfonimide radical-relay reactions.

Chemical science·2024
Same author

Understanding Antiferromagnetic and Ligand Field Effects on Spin Crossover in a Triple-Decker Dimeric Cr(II) Complex.

Journal of the American Chemical Society·2023
Same author

Correction: Radical ring-opening polymerization of sustainably-derived thionoisochromanone.

Chemical science·2023
Same author

Radical ring-opening polymerization of sustainably-derived thionoisochromanone.

Chemical science·2023
Same author

Metal-Carbodithioate-Based 3D Semiconducting Metal-Organic Framework: Porous Optoelectronic Material for Energy Conversion.

ACS applied materials & interfaces·2023
Same author

Localized Active Space-State Interaction: a Multireference Method for Chemical Insight.

Journal of chemical theory and computation·2022

関連する実験動画

Updated: May 28, 2026

[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

モノコッパー (III) - 酸化水素複合体による急速なC-H結合活性化.

Patrick J Donoghue1, Jacqui Tehranchi, Christopher J Cramer

  • 1Department of Chemistry, Center for Metals in Biocatalysis, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States.

Journal of the American Chemical Society
|October 19, 2011
PubMed
まとめ
この要約は機械生成です。

研究者らは,1電子酸化による反応性銅 (III) 水酸化物中間体 (LCuOH) を生成した. このCu (III) 複合体は水素原子を効果的に抽象化し,酸化触媒における潜在的な役割を示唆しています.

さらに関連する動画

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

関連する実験動画

Last Updated: May 28, 2026

[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides (CHIPS)

Published on: June 20, 2014

科学分野:

  • 無機化学 無機化学とは
  • 有機金属化学 有機金属化学
  • カタリシス カタリシス カタリシス

背景:

  • 銅複合体は,その触媒特性のために広く研究されています.
  • 銅の酸化状態と反応性を理解することは,効率的な触媒の設計に不可欠です.
  • 高価量銅種の生成と特徴付けは,研究分野として活発に研究されています.

研究 の 目的:

  • 新しい銅 ((III) - 水酸化物複合体を合成し,特徴づけること.
  • 酸化反応におけるこの銅 (III) の中間物質の反応性を調査する.
  • 銅 (III) 複合体による水素原子抽象のメカニズムを解明する.

主な方法:

  • 低温 (−80°C) で四角形のCu(II) 複合体 ([Bu(4) N][LCuOH]) の1電子酸化.
  • Cu (III) 中間物質 (LCuOH) の形成と同一性を確認するために,スペクトル検査と理論分析を行いました.
  • ダイヒドロアントラセンの反応の運動学的研究,動的同位体効果の測定を含む.

主要な成果:

  • 反応性中間物質であるLCuOHが生成され,Cu (III) 複合体として特定されました.
  • LCuOHは,ダイヒドロアントラゼンと反応してアントラゼンとCu (II) 複合体 (LCu (OH (II)) を生成した.
  • 動力学的研究により,H原子抽象の二次速度法則が明らかにされ,有意な動力学的同位体効果 (k ⋅ H ⋅ k ⋅ D = 44−70°C) が示された.

結論:

  • A Cu ((III) -OH 分子は酸化反応における活性種として機能することができる.
  • この発見は,銅触媒による酸化プロセスにおける重要な中間物質としてのCu (III) -OHの活性を支持する.
  • この研究は,高価銅種の基本的な反応性についての洞察を提供します.